Trigger mechanism for automatic firearms.



PATENTED NOV. 27, 1906.

, J. T. S. SGHOUBOE.

, TRIGGER MECHANISM FOR AUTOMATIC FIREARMS.

APPLICATION FILED AUG. 7, 1905.

3 SHEETS-SHEET 1 FIG/l.

Wrzascs PATENTED NOV. 27, 1906.

J. T. S. SGHOUBOE. TRIGGER MECHANISM FOR AUTOMATIC FIREARMS.

APPLICATION FILED AUG.'I, 1905.

3 SHEETS-SHEET 2.

FIG-r.

FIGS

.flzlfalz/zor." J1w77epdor d ze/z'r do lzou 06 y /3 Vmq M/ PATENTBD NOV. 27, 1906.

J. T. S. SCHOUBOE. TRIGGER MECHANISM FOR AUTOMATIC FIREARMS.

APPLICATION I'ILED AUG. 7 1905.

3 EHEETB-SHEET 3.

FIGQY FIGS.

UNITED STATES PATENT OFFICE.

JELNS THEODOR SUHR SCHOUBOE, OF HOLTE, DENMARK.

4 TRIGGER MECHANISM FOR AUTOMATIC FIREARMS.

Specification of Letters Patent.

Patented Nov. 27, 1906.

Application filed August 7, 1905. Serial No. 278,087.

Accordlng to my invention there is employed the usual recoil and percussion clements or members adapted to cooperate with an improved movable sear and sear-block, preferably carried by the scar, the foregoing parts being operatively connected and cooperatin in the performance of their function with t e trigger through the medium of an engaging or ook member carried thereby. In order to limit the movement of the trig er where a single discharge of the weapon is esired, an improved detent or locking device is provided, which is movabl mounted in such a manner as to permit t e same to be swung out of operative relation to the trigger when continuous firing is desired.

The invention. will be more fully described in connection with the accompanying drawings and will be more particularly pointed out and ascertained in and by the appended claims.

In the drawings Figure 1 shows a view from the left of a firearm provided with the improved trigger mechanism embodying the main features of my invention with parts broken awa and arts in section, the said mechanism eing s own in a cocked position. Fig. 2 is a similar view showingthe parts in the osition they assume when the weapon has een discharged and prior to recoil of the parts. Fig. 3 is a similar view showing the parts in the position they assume subsequent to the discharge and during the recoil movement, the trigger being pulled to effect discharge of a single load. Fig. 4 is a section on line 4 4 of Fig. 1. Fig. 5 is a view similar to Figs. 1 to 3, inclusive, viewed from the ri ht and showing the parts in the position t ey would assume at the extreme recoil movement, the trigger being .pulled to effect conwith a hub 12, is revolublymounte on said which continuous firing is effected, the trigger being shown inthe same position illustrated in Fig. 5. Fig. 7 illustrates side and end elevations of the trigger and hook member carried thereby. Fig. 8 illustrates side and plan views of the sear. opposite side views and a sectional view on line a a of one of the side views of the searblock.

As shown, the stock is indicated by A and Fig. 9 illustrates is broken away to show the recoiling elements, consisting of the breech-block 4, the percussion-pin 4 and the percussion-block 4 The breech-block 4 is provided with a vertically-dis osed slot 4, as clearly shown in Figs. 5 an 6. The transversely-disposed bolt 26 is fixed in the breech end of the stock and is provided with a cylindrical ortion carrying a percussion element in the orm of a lever 1. Said lever is operated in the performance of its function by a spring 6 throughthe medium of a spring-rod 6*, which operatively engages said lever 1. The hub 11 of said lever 1 is provided with a camshaped enlar ement 27, terminating in a percussion-shoufder 28, the purpose of which will hereinafter more fully appear. A recoil element in the form ofa lever 22, rovided bolt 26, said lever having at one end an enlargement seated and operating in the slot 4 of the breech-block. Said lever is normally held in a forward position and returns the recoil elements from a recoiling to a normal position by means of a spring 5, which operates on said recoil-lever through the medium of a sprin -rod 5. Said lever 2 is provided with a hu 12, having on its lower face a recoil projection 29.

The trigger 7 is mounted on a bolt 16 and comprises a finger-piece projecting outwardly through the stock and an integral forwardly projecting carrying member 7 Said trigger 7 is held in a normal position by a spring 13, seated at one end in a recess formed in said stock and at its other end in a recess formed in said carrying member 7 The trigger is provided with a finger 17, adapted to operatively engage a-sear-block, hereinafter described, and 1s also provided with an en aging or hook member 8, having asear-shou der 20, which member is pivotally mounted to the trigger at 8. A trig er detent or locking device in the form of a ell-era lever 15 is pivotally mounted at15" and i (adapted,- when adjusted in the'position shown 1, 2, and 3, to engage the finger-piece of the trigger and limit the rearward movement f v in the stock to permit the extreme rearward movement of the trigger. Suitable standards a are provided, in which a bolt '21 is mounted, said standards extending upwardly from the lower wall of the stock in parallel relation; A sear 9 is pivotally mount-- ed on said bolt 21 at one end and at its other end is adapted to be operativel-y engagedby the shoulder of said member 8, the said sear preferably being apertured at 19 and permitting passage of said member 8, said aperture being of sufficient size to allow said member to be thrown into and out of operative relation with the sear. A lug 23, formed on said sear and preferably near the central portion thereof, is adapted for en agement withthe percussion-shouilder28 of t e lever 1. In order to normally retain the lug in engagement with said shoulder 28 when the lever is thrown into cocked position, I provide a spring 14,

which in the present construction is connected at one end to a lug formed on the member 8 and at its other end to a lug 22 formed on the sear 9. I In connecting the spring in the manner set forth the same performs the dual function of holding the sear in engaging proximity to the percussion-lever and also holding the member 8 in a position to effect engagement between the shoulder 20 and the sear'9. A sear-block 10 is preferably slidably mounted upon .the sear, said block having a slot 25, adapted to embrace a portion of the upper and lower faces of the sear and one side face thereof and. bein held in sliding enga ement upon the seary means of one oft e standards a. The rear end of said block is provided with a jaw -24, adapted to straddle lows:

the =bolt 21. The opposite face of said block 10-is provided with a recess 18, adapted to receive' the fingers 17. Said block is provided on its forward face with a cam-surface 10 to permit the rejection 29 to ride upon and depress said b ock in a manner to be hereinafter described.

When a single discharge is to be fired, the detent 15 is adjusted in the position shown in Figs. 1 to 3, inclusive, and the parts being in the osition shown in Fig. 1 operate as fol- ?lpon pulling the trigger the carrying member 7 is do ressed, carrying with it the member 8, whic engages and depresses the sear 9, throwing the lug 23 out of engagement with the percussion-shoulder 28. The lever 1 is released from the cocked position (shown in Fig. :1) and is thrust forward by a spring 6 to engage the ercussion-block 4 as shown in Fig. 2. en the shell is discharged, .the consequent recoil throws the parts in the pcsitionshown in Fig. 3, the cam enlargement 27 engaging the lug 23 and deseems pressing the sear 9 against the action of sprin 14 until the lever 1 attains the position s own in Fig. 5, wherein the lug 23 engages the percussion-shoulder 28. The projection 29, Fig. 3,, is shown engaging the member 8, thrusting the same .outwardly in the slot 19 of the sear 9, this operation being hereinbefore described in connection with After the lug 23 has engaged the percussionshoulder and locked the lever -1 in a cocked position the spring 5 returns the recoil parts to a normal position through the lever 2, the lug 29 releasing the member 8 and permit- '.ting it to return to the position shown in Fig. 1, wherein the shoulder 20 is looked upon the sear 9. In order to effect continuous firing, the detent 15 is swung into the position shown in Figs. 5 and 6 and the trigger 7 is thrust rearwardly until the carrying portion 7 lies flat upon the upper face of the lower wall of the stock, as shown in said figures, or in a substantially horizontal position. This operation,-through shoulder 20, depresses the sear 9 and releases the percussion-lever, as hereinbefore described, and after discharging the shell the parts recoil. The lug 2'9 throws member 8 forwardly, releasing engagement between the shoulder 20 and the sear 9. The spring 14 serves to raise the sear and engage t e lug with the percussion-shoulder 28 to temporarily hold the percussion-lever in a cocked position until the recoiling parts have been returned to a normal position. It will now be understood that when said recoiling arts have returned to normal osition it is esired to automatically fire theu-tton without again pulling the trigger, and to this end it is necessary to automatically depress the sear 9 and release the lever 1. It will be noted. that in the extreme movement of the trigger 7 the finger 17 will have thrust the sear-block 10 forwardly to the position shown in Figs. 5 and 6. Thus after the parts have been returned from a recoiling to a normal position the lug 29 will ride upon the upper surface of the cam-block, depressing the sear '9 and releasin engagement between the shoulder 28 an the lug 23 and causing the percussion-lever 1 to automatically engage the percussion-block 4 through spring 6.

ger is held in the position shown in Figs. 5 and 6 the lug 29 W'lll upon return movement of the recoiling arts engage the cameblock and automatical y depress the scar and, fur- I claim 1. A trigger mechanism for recoil-guns the adjustment of parts for continuous firing.

e lover 1 until the trigger is again ICC It will be obvious that as long as the trigther, that if the trigger is released an apprecomprising in combination a trigger, an engaging member movably mounted thereon and provided with a shoulder, a movablymounted sear adapted to be engaged by said shoulder, a spring connected with said engaging member and sear, a slidably-mounted sear-block, and a recoil-lever havin a projection adapted to cooperate with said engaging member and sear-block.

2. A trigger mechanism for recoil-guns comprising in combination a trigger, an engaging member movably mounted thereon and provided with a shoulder, a movablymounted sear adapted to be engaged by said shoulder, a spring connected with said engaging member and sear, a slidably-mounted sear-block,a recoil-lever having a projection adapted to cooperate with said engaging member and'sear-block, and a detent for said trigger.

3. A trigger mechanism for recoil-guns comprising in combination a trigger member, an engaglng member movably mounted thereon and provided with a shoulder, a movably-mounted sear adapted to be engaged by said shoulder, means yieldingly connecting said engaging member and sear, a sear-block slidably-mounted on said sear, and

means effecting operation of said engaging member and sear-block.

4. A trigger mechanism for recoil-guns comprising in combination a trigger member, an engaging member movably mounted thereon, a movably-mounted sear adapted to be engaged by said member, a slidablymounted sear-block, a recoil-lever havin a projection adapted to engage said mem er and block, and a percussion-lever adapted to be engaged by said sear.

5. A trigger mechanism for recoil-guns comprising in combination a trig) er member provided with a finger, a mova y-mounted sear provided with a lug, a sear-block slidably mounted on said sear and engaged by said finger, an engaging member mounted on said trigger, a s ring connecting said engaging mem er an sear, a recoil-lever provided with a pro'ection adapted to engage said member an sear-block, and a percussion-lever adapted to be en aged by said lug. 6. A trigger 'mec anism for recoil-guns comprising in combination a trigger member, a sear, a sear-block o eratively connected with said trigger mem er, a recoil-lever co operating with said sear-block, and an enaging member carried'by said trigger member and cooperating with said sear and recoillever.

7. A trigger mechanism for recoil-guns comprising in combination a trigger member provided with an en agin mem er, a movably-mounted sear a apte to be 0 eratively connected with said enga 'ng mem er, a percussion-lever adapted to e enga ed by said sear, a spring connecting 'sai engaging member and sear, a sliding sear-block operatively connected with said tri ger member, and a recoil-lever provided wit a rojection adapted to engage said sear-bloc gaging member.

In testimony whereof I have signed my name to this specification in the presence of' two subscribing witnesses.

JENS THEODOR SUHR S GHOUBOEr and en- 

